Rod coupling



A ril 12, 1938. G. E. NEUBERTH 2,114,127

ROD COUPLING Filed June 12, 1935 INVENTOR 560566 f. Neubef/h Patented Apr. 12, 1938 UNITED STATES PATENT OFFICE ROD COUPLING Application June 12,

3 Claims.

relative movement between the connected parts and not come uncoupled or loose in use. The object of the invention is to provide suc a coupling which will hold the parts securely together but which may be quickly connected and disconnected. Further objects and novel features of the invention will be apparent from the following description of an exemplary embodiment thereof, reference being made throughout the description to the accompanying drawing, wherein:

Fig. 1 is a longitudinal section showing the parts assembled;

Fig. 2 is a cross section taken on the line 2--2 of Fig. 1; Fig. 3 is a cross section taken on the line 3-3 of Fig, 1;

Fig. 4 is a longitudinal section showing a modified locking device;

Fig. 5 is a cross section taken on of Fig. 4; and I Fig. 6 is a cross section taken on the line 6-6 of Fig. 4. Referring to the drawing of the first modificathe line 5-5 tion, Figs. 1 to 3; the coupling comprises the adjoining reduced ends l0 and II of the parts to be coupled, for example a mandrel A and its tail I piece 13. The parts l0 and 'I I are spliced together as by being flattened ontheir mating surfaces Illa, lla respectively. They are formed with mating retaining elements, such for example as the shoulders lllb, llb respectively which fit within corresponding notches lllc, llc.

When the parts I0 and II have been placed together as shown in Fig. 1 a sleeve I2 is slid endwise over them to retain them in this position. The sleeve is bevelled interiorly at one end to tighten upon a corresponding bevelled portion on the mandrel. sleeve are approximately the same as those of the mandrel. When the sleeve is moved into assembled position its end abuts a shoulder "id of the part l0 and an annular recess is left be- The external dimensions of the 1935, Serial No. 26,108

tween its end and a shoulder lld formed on the part ll.

To secure the sleeve in position a locking device such as the spring clip I3 is forced over the part ll within the annular recess, The clip is preferably formed with thickened ends l3a and a flexible central portion I31) and is of suflicient length to completely fill the space between the end of the sleeve l2 and the shoulder lld. The thick ends [3a thus have sufficient strength to take their portion of theend thrust to which the. mandrel is subjected.

In Figs. 4-6 there is shown a modification of the locking device, generally designated by the numeral i l, in which the spring element la is 'made separately from the body portions Mb. A leaf spring which is disposed within a recess ldc and secured to the body portions by pins Md is illustrated but obviously other types of springs might be employed. A gap Memay be provided by b evelling the adjacent ends of the body members to permit spreading when the locking member is forced upon the mandrel.

In assembling the coupling the mandrel parts l0 and II are placed together in mating relationship, as shown-in Fig. 1, and the sleeve I2 is pushed endwise over the joint. Then the locking device l3 or I4 is forced over the recessed portion until it fits properly. Preferably a clamp in which pressure can be gradually exerted until the locking device is fully seated is used. A similar device may be used for pulling the locking device off.

It will thus be seen that I have provided a simple, convenient and dependable coupling which may be easily connected and disconnected and which will hold the parts securely together until they are intentionally disconnected. While the coupling is described for use on a mandrel it will be obvious that it may have various other uses. Also while certain embodiments are illustratedthe invention may have other embodiments within the scope of the subjoined claims.

I claim:

1. In a coupling for rod parts having reduced shouldered ends on said parts and interfitting retaining elements adapted to be engaged by lateral movement including shoulders and grooves on said ends, a sleeve slidable on said reduced ends and engaging one of the firstmentioned shoulders when embracing said interfitting retaining elements for holding them in interlocked relation, and rigid locking means interposed between the end of the sleeve and the other one of said first mentioned shoulders with sufiicient tightness to retain said second mentioned shoulders in constant close engagement and to take at least part of the end thrust on said rod parts, said locking means extending over more than half of the circumference and being adapted to take longitudinal thrust over its entire end surfaces.

2. A rod coupling as set forth in claim 1 in which said locking means is formed as a spring clip with the thick rigid portions connected by a thin resilient intermediate portion.

3. A rod coupling as set forth, in claim 1 in which said locking means comprises separate thick rigid members connected by an embracing spring recessed into the intermediate portions thereof.

GEORGE E. NEUBER'I'H. 

